LDO voltage regulator (output voltage 0 to 1.8 V)

Power supply voltage stabilizer converts supply voltage to voltage of the specified value and operates in two modes: DC/DC step down converter and LDO. DC/DC step down converter mode offers high efficiency over a supply voltage range (up to 83.8%). Voltage adjustment is made by switching resistive chain in feedback circuit. Voltage drop on power line is also compensated by feedback.
The block is fabricated on iHP SiGe BiCMOS 0.25 um (SGB25V) technology.